Alpha Centauri, the closest star system to Earth, might harbor a small, rocky world within the habitable zone, new computer simulations suggest.

Tsunamis like the one that devastated ancient Alexandria in A.D. 365 may hit the Mediterranean relatively often, a new study says.

The placid, long-standing crater lake might have left behind sediments that could reveal whether ancient Mars was capable of supporting life, a new study says.

A European spaceship is en route to become the first unmanned craft to dock with the International Space Station.

Scheduled for takeoff Tuesday, the shuttle Endeavor will deliver the robot "Dextre" to the space station. "It's a little monstrous, it is," according to one astronaut.

Pollution drifting up from populated areas threatens polar bears in their formerly pristine Arctic habitat, according to Norwegian researchers.

They may cripple your desktop, but computer viruses can also be stunningly beautiful to look at, as an art exhibition in London shows.

In a week when massive flooding is turning back the clock for the Grand Canyon, a controversial new study is shedding light on just how far back the canyon's history goes.

Like a child mimicking its parent, the otherwise unremarkable moon Rhea might have its own small system of rings, scientists say.

New research on sea levels since the Cretaceous shows that while ancient oceans were 560 feet (170 meters) higher than today, in millions of years they will drop 230 feet (70 meters) lower.

A new computer program can predict what a person is seeing based on brain activity, a study reveals—opening the door for useful but controversial "brain scanning" technology.

Adult moths avoided a nail-polish odor that they were trained to steer clear of as larvae—suggesting the bugs retain some memories through metamorphosis, a new study says.

A tiny, 55-million-year-old primate raises the controversial possibility that primates arrived in North America thousands of years before they reached Europe, a new study says.

The first-ever image of cascading debris on Mars is among 2,400 newly released snapshots of the red planet recently taken by an orbiting camera.

In a win for whales, dolphins, seals, and sea lions, according to conservationists, most of the lower courts' restrictions were upheld.